Which of the following option is /are the correct representation of the formula for the compoud `CaCl_(2)` ?

Options

A.
B.
C.
D. Cl-Ca-Cl

Explanation

To determine the correct representation of the formula for the compound \( \text{CaCl}_2 \), we need to analyze the components of the compound and their respective symbols.

### Step 1: Identify the Elements
The compound \( \text{CaCl}_2 \) consists of two elements: Calcium (Ca) and Chlorine (Cl).

### Step 2: Understand the Chemical Formula
The formula \( \text{CaCl}_2 \) indicates that there is one calcium atom and two chlorine atoms in each formula unit of calcium chloride.

### Step 3: Valency of the Elements
- Calcium (Ca) has a valency of +2 because it is an alkaline earth metal and tends to lose two electrons.
- Chlorine (Cl) has a valency of -1 because it is a halogen and tends to gain one electron.

### Step 4: Combining the Elements
To form a neutral compound, the total positive charge must balance the total negative charge. Since calcium has a +2 charge and each chlorine has a -1 charge, two chlorine atoms are needed to balance the +2 charge from one calcium atom.

### Step 5: Final Representation
Thus, the correct representation of the formula for the compound is \( \text{CaCl}_2 \).

### Conclusion
The correct representation of the formula for the compound \( \text{CaCl}_2 \) is indeed \( \text{CaCl}_2 \).

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